[故障报告]

Description of the problem When pandawiki re-learns files, why does it call LLM, and why does it make two requests with different formats? One is the system prompt and document content concatenated in the "role": "system" field, and the other is the system prompt in the "role": "system" field, and the document content in the "role": "user" field. The request without the "user" field causes the local model service to throw an exception, ValueError: No user query found in messages.